Journal article
Effect of windowing and zero-filled reconstruction of MRI data on spatial resolution and acquisition strategy
Journal of magnetic resonance imaging, Vol.14(3), pp.270-280
09/2001
DOI: 10.1002/jmri.1183
PMID: 11536404
Abstract
Standard, MR spin-warp sampling strategies acquire data on a rectangular k-space grid. That method samples data from the “corners” of k-space, i.e., data that lie in a region of k-space outside of an ellipse just inscribed in the rectangular boundary. Illustrative calculations demonstrate that the data in the corners of k-space contribute to the useful resolution only if an interpolation method such as a zero-filled reconstruction is used. The consequences of this finding on data acquisition and data windowing strategies are discussed. A further implication of this result is that the spatial resolution of images reconstructed with zero-filling (but without radial windowing) is expected to display angular dependence, even when the phase- and frequency-encoded resolutions are identical. This hypothesis is experimentally verified with a slit geometry phantom. It is also observed that images reconstructed without zero-filling do not display the angular dependence of spatial resolution predicted solely by the maximal k-space extent of the raw data. The implications of these results for 3D contrast-enhanced angiographic acquisitions with elliptical centric view ordering are explored with simulations.
Details
- Title: Subtitle
- Effect of windowing and zero-filled reconstruction of MRI data on spatial resolution and acquisition strategy
- Creators
- Matt A. Bernstein - Mayo ClinicSean B. Fain - Mayo Clinic in FloridaStephen J. Riederer - Mayo Clinic
- Resource Type
- Journal article
- Publication Details
- Journal of magnetic resonance imaging, Vol.14(3), pp.270-280
- Publisher
- John Wiley & Sons, Inc
- DOI
- 10.1002/jmri.1183
- PMID
- 11536404
- ISSN
- 1053-1807
- eISSN
- 1522-2586
- Number of pages
- 11
- Language
- English
- Date published
- 09/2001
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Electrical and Computer Engineering; Health and Human Physiology
- Record Identifier
- 9984275053502771
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